Doors to Automatic
There should be a space in the market for a carrier such as Maxjet whilst the established carriers charge such astronomical fares for non-economy long haul travel.
Long haul economy has now got so bad on many carriers that the seats are physically painful to sit in for an hour, let alone 8+ hours. There are lots of affluent leisure passengers and price-sensitive business passengers who would pay a bit more to avoid this but who can't/won't pay £000s more.
Compare the fares on BA: The cheapest LHR-JFK economy fare is about £300 return; in World Traveller Plus it's about £800. For a fare 160% higher, you get about 20% more space - and absolutely nothing else. Business class starts at £2k return, 600% more than economy. These price premia do not remotely reflect the additional costs to the airline.
Premium passengers are cross-subsidising everybody else, and this creates an opportunity for new carriers. Good luck Maxjet.
In contrast I can't understand what Eos's unique selling point is. On the rare occasions my employer is willing to pay £3k for a long haul flight, I go for carriers with convenient central airports, backup if something goes wrong and an FFP...